Coarsening of granular clusters: two types of scaling behaviors

Details Coarsening of granular clusters: two types of scaling behaviors Coarsening of granular clusters: two types of scaling behaviors

2002-11-05

arxiv.org/abs/cond-mat/0211089v1

Physics

Condensed Matter

Statistical Mechanics

4 pages,5 figures, submitted to Phys.Rev.E

Scientific paper

10.1103/PhysRevE.67.010302

We report on an experimental study of small cluster dynamics during the coarsening process in driven granular submonolayers of 120mkm bronze particles. The techniques of electrostatic and vertical mechanical vibration were employed to excite the granular gas. We measure the scaling exponent for the evaporation of small clusters during coarsening. It was found that the surface area of small clusters S vs time t behaves as S ~ (t_0-t)^(2/3) for lower frequencies and S ~ (t_0-t) for higher frequencies. We argue that the change in the scaling exponent is related to the transition from three dimensional to two dimensional character of motion in the granular gas.

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